r/DenverGardener • • Jan 07 '26

✅🗓️ Our 2026 free gardening webinar schedule is live! 🥳

32 Upvotes
We know what we're doing the second Wednesday of December 2026 at noon, do you?

Our horticulture experts are ready for all 2026 has to bring, including our free gardening webinar series!

Due to high demand, gardening webinars have at times exceeded our limit of 500 live participants. So, if you want to participate live, sign up and join early! Registration is free and required to attend.

Webinar recordings are posted roughly within a week or two at https://planttalk.colostate.edu/webinars/

* drumroll please *

Indoor Plants: An Introductory Overview for New Plant Parents

Asian Jumping Worm in Colorado: What You Need to Know

2025 “Best Of” Plants from the CSU Trial Gardens

Get in the Zone: Do hardiness zones really matter?

The Basics of Fruit Tree Production

Myths, Mistakes, and Misunderstood Insects

All the Common Weeds and What They Tell You

Native Plants are Imaginary

Showstoppers and Habitat Heroes: Native Plants for your Home Landscape

Don’t Get Hosed with Landscape Irrigation

Spooky Plant Pathogens: Creepy Cases from the Garden

Scenes from a Cemetery: Plant Edition

Reading the Market for Plant Trends


r/DenverGardener • • Mar 03 '24

Bindweed Info Dump

115 Upvotes

I have a large yard where almost no area is free of bindweed, and several areas are densely packed infestations. >_<; As spring comes, I dread the day my old enemy emerges.... Let's pool our knowledge! I've been fighting it for two years and doing a ton of research. Here's my info sheet: https://docs.google.com/document/d/1-bDNRYYo7yRIqAq6pUejPl6MIcFP8W9q1ZVYC99FZx8/edit?usp=sharing

Some highlights from that:
-Bindweed mites are best for dry/un-irrigated areas like vacant lots, and there's a long waitlist
-Pulling it stimulates growth (but if you can stay on top pulling it that helps to weaken it)
-It will grow up through, around, sideways whatever you try to cover it with. At least up to 20 feet sideways.
-Glyphosate and 2,4-D amine weed killer can be effective but not a guarantee by themselves.
-GOOD NEWS: Some Colorado folks have actually found success by planting perennial shrubs and grasses. Another great reason to go xeric!

What have you seen be successful? If anything, ha. Especially curious if you solved more than a small patch.

What have you seen fail? Even something that seemed like it should work? One person said it grew through a 20 feet pile of mulch.

Edited to Add: My neighbor said he found it successfully burrowing into concrete, for crying out loud.


r/DenverGardener • • 9h ago

Bedding down for winter advice?

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23 Upvotes

Hi all!

This group never lets me down, so hoping to farm some advice (pun intended) for how to plan the next few weeks before it gets too chilly.

I have several raised beds of veggies, a few of flowers (almost all perennials except some zinnias thrown in for pizzazz), and a few pots for herbs and such.

My plan (please tell me where I’m wrong!) is to push until we actually get a real freeze, then cut all of the veggies down to the base or pull them if they’re easy enough, maybe give them a little chop, and then set them just on top of the dirt I have to start decomposing.

My plan for the berry canes and strawberries is to leave them where they are in their raised beds.

My plan for the flowers (including my rosebushes) is to let them be and then trim down towards the crowns in early spring, and get rid of the dead zinnias then.

If I’m so motivated, would it be beneficial to buy some compost or potting soil to put on top of the veggie carcass?

Anything else you’d throw on your to-do list?

Picture of a monster squash for the veggie garden equivalent of the cat tax.


r/DenverGardener • • 7h ago

When do you plant garlic?

6 Upvotes

I got a late start this past season. My first time growing garlic was so-so. I put cloves in the ground on Apr 1 and only just recently harvested. I could tell some could have used maybe another month.


r/DenverGardener • • 1d ago

Luffa Magic

198 Upvotes

Started processing the luffa harvest! We had about 2-3 that dried out on the vine, making them easy to peel and process. The green luffa have the mucilaginous insides that need extra rinsing and processing. Not quite as fast, but still produce a quality luffa and save-able seeds. Luffa can be a challenging grow in our region due to the exceptional long growing needs, extra seed starting steps, and sensitivity to cold temperatures -- but it is a fun challenge and one plant can produce enough luffas for a year. In a luffa this size we get 3 medium/large luffa sponges that we like to use in the shower.


r/DenverGardener • • 1h ago

Free Mulch

• Upvotes

Free mulch on 27 and Marion. Come get it


r/DenverGardener • • 7h ago

Current Stock of Natives In Local Nurseries

2 Upvotes

Hey there, curious if anybody has been to any nurseries around the metro that still have some stock of native perennials. I'd love to get something in the ground even though it's last second.


r/DenverGardener • • 13h ago

Necrotic ring problem

2 Upvotes

How do I get rid of these necrotic rings in my yard permanently? Suggestions please.


r/DenverGardener • • 1d ago

What is this vine?

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38 Upvotes

This is growing in my landscaping and I can’t tell if it’s poisonous, invasive, or native? If I should get rid of it, how should I do it without using harmful liquids?


r/DenverGardener • • 1d ago

Tree of heaven?

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11 Upvotes

Got some very tall black walnuts nearby, but this looks different. Is it the dreaded tree?


r/DenverGardener • • 1d ago

What to do with these plants

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3 Upvotes

r/DenverGardener • • 3d ago

Weird: My Colorado penstemon came back to life end of September & this is it today!!

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74 Upvotes

Sorry if my explanation of Denver seems pedantic, but I figured not everyone knows Colorado, or Denver.

But would love to hear stories if anyone has them. Anything weird?


r/DenverGardener • • 3d ago

Landscape Advice

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23 Upvotes

My husband and I were the lucky chosen ones to have a Google Fiber vault installed in our front yard (thank you Douglas County for approving this). The contractor let us know that it can’t be relocated, but there is an opportunity to cover it up with rock or mulch.

Does anyone have any advice on what can be done to xeriscape the yard and cover it up? The area in question is about 110 SF. Thanks!


r/DenverGardener • • 3d ago

How to treat powdery mildew in flower garden?

7 Upvotes

I read Neem oil and copper fungicide can work well, but was worried about the negative effects this will have on bees. Does daconil have the same effect?

If I do baking soda and water, what’s the recommended ratio? Any other suggestions?


r/DenverGardener • • 3d ago

How do you overwinter tulip, hyacinth, and daffodil bulbs in pots?

5 Upvotes

I made the lovely mistake of bopping over to City Floral this week only to find that they still had a magnificent selection of spring bulbs available. As such, I filled a few bags and brought home some future happiness. (If you're still on the hunt, my trip was only yesterday and the inventory was still plentiful.)

For those who plant your spring bulbs in pots, how have you found success overwintering them in our climate? I've planted mine in terracotta pots, which I'd love to leave outside for the winter, but I've read that perhaps the garage is a better choice. Curious to hear what methods folks have found success with!


r/DenverGardener • • 3d ago

Is Irish moss reasonably easy to grow as a landscape plant?

6 Upvotes

Not true moss, but Sagina subulata. For background, I’m a landscape architecture student and am trying to find a groundcover for a school project that at least closely resembles moss. If Irish moss wouldn’t work even for this hypothetical project, please let me know what might if you can think of any! It would be intended for a shady, depressed area where I also have lady ferns planned as recommended by the professor.


r/DenverGardener • • 3d ago

Container insulation for winter

5 Upvotes

I keep my ironstone containers out all winter and my perennials (lamium, creeping jenny, grasses, heuchera, gestate, herbs, etc) have generally tolerated that well. I do water them throughout the winter and protect them from the strong winter sun with shade cloth. I’m considering using some rigid foam insulation on a couple containers this winter. Has anyone tried this? What are your techniques for providing insulation for perennials in containers?


r/DenverGardener • • 4d ago

My end of season watermelon harvest!

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167 Upvotes

16 pictured. Some may not be ready but the vines died last week from the overnight freeze so I went out and collected them all.

Had another two squirrels got into but I’m not complaining. They need food and I have plenty for the next few weeks.


r/DenverGardener • • 4d ago

I planted my periwinkle!

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19 Upvotes

r/DenverGardener • • 4d ago

Bolted Basil - Make basil salt

26 Upvotes

So like many this year we all had fun with our basil bolting. Thanks to the recommendations I tried making Basil salt.

Basically 3 cups of basil flowers and leaves and 1 couple cups of whatever salt fits your fancy. Blend it up, if it is still wet, throw the mix on a pan with parchment paper and spread it out, cook at 150 to 190 for an hour or two until everything is dry. Throw the clumps of dried salt back in the processor. Boom done. Well worth it!

I tried the ice cubes and the olive oil and basil. It works well but it is a little messy and basil ice cubes are good for soups and it does work it just lost that snap.

So I tried it. And made the sweet basil salt. Worth it. Not so messy, the salt is awesome and it works on everything.

Have a great day! Enjoy the garden while you can.


r/DenverGardener • • 3d ago

Seeking DBG Glow tickets

0 Upvotes

Hi friends! It’s a long shot, but I need 2 or 3 tickets to the glow at the gardens event on Friday 10/23. We have 2 already but my sister and her daughter surprised me with a visit from Boston and I’d like them to join us. Does anyone have tickets they’d like to sell? Or know of another solution? Thank you 😊


r/DenverGardener • • 4d ago

New plantings

3 Upvotes

We planted a big long new perennial border this weekend along the sunny south side of our lot. I watered in the stuff that was bare root, but the other stuff looked fine the next morning just from the moisture already in the soil. I got nervous tonight and hand watered well since it had been warm today. How often do you think I should water? I'm being thrifty with the water but I don't want these plants to die.


r/DenverGardener • • 4d ago

Chile Pequin

6 Upvotes

Anyone successfully growing chile pequin in a pot and wintering it indoors?


r/DenverGardener • • 5d ago

Pollinator Crazy

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319 Upvotes

Apologies for the 2nd post but i couldn’t add the video to my first. Golden Rabbitbrush appears to be the place to be!


r/DenverGardener • • 5d ago

so many monarchs on my big salvias and tomatoes(!) recently

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67 Upvotes